/*
 * Copyright 2002-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.core.codec;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.ResolvableType;
import org.springframework.lang.Nullable;
import org.springframework.util.MimeType;

import java.util.Arrays;
import java.util.List;

/**
 * Abstract base class for {@link Decoder} implementations.
 *
 * @param <T> the element type
 * @author Sebastien Deleuze
 * @author Arjen Poutsma
 * @since 5.0
 */
public abstract class AbstractEncoder<T> implements Encoder<T>
{

    private final List<MimeType> encodableMimeTypes;

    protected Log logger = LogFactory.getLog(getClass());


    protected AbstractEncoder(MimeType... supportedMimeTypes)
    {
        this.encodableMimeTypes = Arrays.asList(supportedMimeTypes);
    }

    /**
     * Return the currently configured Logger.
     *
     * @since 5.1
     */
    public Log getLogger()
    {
        return logger;
    }

    /**
     * Set an alternative logger to use than the one based on the class name.
     *
     * @param logger the logger to use
     * @since 5.1
     */
    public void setLogger(Log logger)
    {
        this.logger = logger;
    }

    @Override
    public List<MimeType> getEncodableMimeTypes()
    {
        return this.encodableMimeTypes;
    }

    @Override
    public boolean canEncode(ResolvableType elementType, @Nullable MimeType mimeType)
    {
        if (mimeType == null)
        {
            return true;
        }
        for (MimeType candidate : this.encodableMimeTypes)
        {
            if (candidate.isCompatibleWith(mimeType))
            {
                return true;
            }
        }
        return false;
    }

}
